This particular slime is also called Flubber, Gluep, Glurch, or Gak, and it’s made from glue, water, and the tiniest bit of Borax, a mild powdered laundry soap. (NOTE: Borax is soap and it’s toxic, so please use your best judgment if you choose to use this with young children.)
I wasn’t sure how messy this would get and set the whole project up in our big mixing tub. The best part? The ingredients don’t have to be combined exactly in order to get perfect results!
Materials:
- plastic tub or bin
- glass bowl
- glue
- warm water
- food coloring (optional)
- Borax
Instructions
Squeeze about 4 ounces of glue into a glass bowl.- Mix in 1 1/2 bottles of warm water. (The recipe calls for 4 ounces of glue and 4 ounces of warm water, but remember: the measurements don’t have to be exact and it will still work.)
- Add your food coloring, if desired. We added red food coloring and mixed it into a lovely shade of pink.
Mix 1 teaspoon of Borax into 1/2 cup of water, and slowly add the solution to the glue mixture.- Stir in the Borax solution until the slime started to come together. We did not use all of the Borax solution.
- Knead the Flubber. At first it will be really wet and gooey, then stringy and sloppy, until finally it will hold together.
We 
kept kneading until we had one easy-to-work-with mass of slime that could be pulled apart and manipulated—to some extent, because really, this slime has a mind of its own. My daughter requested a muffin tray with the idea that it would make nice little cakes. It is so viscous and pliable it is! Completely different from play dough, and absolutely inspiring to little Miss Curious. She tried cookie cutters to no avail, but scissors were so much fun and completely rewarding with this medium.
When you’re done using your Gak, you can store it in a sealable container or 
Ziploc bag for about two weeks (when it may start to smell!).
To learn more about the benefits of sensory play, visit Sensory Play and Early Child Development.
SOURCE:http://www.pbs.org/parents/crafts-for-kids/gak-attack/